181272041 has 2 divisors, whose sum is σ = 181272042. Its totient is φ = 181272040.

The previous prime is 181271983. The next prime is 181272089. The reversal of 181272041 is 140272181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 132342016 + 48930025 = 11504^2 + 6995^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-181272041 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 181272041.

It is not a weakly prime, because it can be changed into another prime (181272941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90636020 + 90636021.

It is an arithmetic number, because the mean of its divisors is an integer number (90636021).

Almost surely, 2^181272041 is an apocalyptic number.

It is an amenable number.

181272041 is a deficient number, since it is larger than the sum of its proper divisors (1).

181272041 is an equidigital number, since it uses as much as digits as its factorization.

181272041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 896, while the sum is 26.

The square root of 181272041 is about 13463.7305751415. The cubic root of 181272041 is about 565.9485369434.

The spelling of 181272041 in words is "one hundred eighty-one million, two hundred seventy-two thousand, forty-one".